The Pali Text Society's Pali-English dictionary
Adhigama,[fr. adhigacchati] attainment,acquisition; also fig. knowledge,information,study (the latter mainly in Miln) D.III,255; S.II,139; A.II,148; IV,22,332; V,194; J.I,406; Nett 91; Miln.133,215,358,362,388; PvA.207. (Page 28)
Concise Pali-English Dictionary by A.P. Buddhadatta Mahathera
(m.)
attainment; knowledge.